Polymeric compositions for manufacture of secondary electron multiplier tubes and method for manufacture thereof
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorYoshi Kishimoto
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Abstract
Disclosed are polymeric compositions for manufacture of secondary electron multiplier tubes. The polymeric compositions may be provided by combinations of (1) insulating polymers having a high secondary yield, (2) conductive particles such as carbon black, graphite or metal particles which may be granularly dispersed into the insulating polymers and (3) organic semiconductors soluble in and compatible with the insulating polymers and adapted to be molecularly dispersed therein. The organic semiconductors may be organic semiconducting polymers wherein the polymers themselves are conductive.
Claims11
A polymeric composition for the manufacture of a secondary electron multiplier, comprising
- a polar type or electron donor matrix polymer having a secondary electron yield higher than unity and molecularly dispersive conductive molecules and less than 50% by volume of granularly dispersive conductive particles, said composition having a volume resistivity in the range of 10.sup.5 to 10.sup.10 ohm-cm.
Dependencies are inferred from the claim text.